Wouldn't it just be logical? 4000 years means nothing in the SW universe.In Kotor you have practically the same technologie. Hyperspace will take longer to charge, weapons aren't quit as destructive etc.
If someone owned HK-47, that person WILL upgrade him with new technologies. He has a very advanced core, remember? He can function as a protocoldroid etc, hiding his true intensions. Also, he was made by Revan, probably with help from the Starforge itself!
I think he will fit in nicely, making the SW-galaxies players laugh as much as we did.
"I think the Devil ****s Dutchmen."